Wildfire smoke can be harmful to both animals and humans, and people with preexisting lung conditions, children and pregnant women are especially at risk for becoming seriously ill from poor air quality.
Officials and health experts urged residents to stay indoors unless absolutely necessary, keep doors and windows closed, and use fans and air conditioners to keep air circulating in their homes.
Regulators didn't start monitoring air quality soon enough during the monster storm, which brought a spike in hazardous emissions from industrial facilities.
